WT8266-S3 Wi-Fi module is a low consumption, high performance Wi-Fi network control module designed by Wireless-Tag. It can meet the IoT application requirements in smart power grids, building automation, security
and protection, smart home, remote health care etc.

WT8266-S3V2.0 Datasheet V2.0 2018-07-18


The module’s core processor ESP8266 integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit processor with smaller package size and 16 bit compact mode, main frequency support 80 MHz and 160 MHz,support RTOS, integrated Wi-Fi MAC / BB / RF / PA / LNA, on-board PCB antenna.

The ESP-07S (WT8266-S3) WiFi module supports the standard IEEE 802.11 b/g/n protocol and a complete TCP/IP protocol stack. Users can use this module to add networking functions to existing devices, or build independent network controllers.


> Ultra-Small

> Ultra-low power,suitable for battery powered applications

> 2.4G on-board antenna

> Stable RF performance

> Integrated TCP/IP Stack

> Integrated TR switch, balun,LNA, Power amplifier and matching network

> Support AT remote upgrades and cloud OTA upgrade

> Support STA/AP/STA+AP operation modes


> Smart grid

> Building automation

> Security

> Telemedicine